Most old books say similar things. The bible says its okay to own slaves and beat them, so long as you don't kill them, and Christianity has been responsible for the deaths of millions as well. Yet we don't have people running around saying we need to ban the Bible. Outside of religion beliefs such as Nationalism, which has its own books, have killed millions as well.
Play this game a few times, it mixes up bible and quran quotes and has you guess which is which:
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The reality is that people in poor areas, rife with violence, and lacking in education will always be susceptible to radicalization regardless of the book being used to do it, if a book exists at all. Its an aspect of humanity that has been happening in pockets of the world throughout history. Islam is nothing unique in this regard, and if it didn't exist something else would take its place in that area of the globe. You don't fix it by banning a book, you fix it through peace and education. By affording those things to refugees you do more to solve the problem than by leaving them to rot in war zones.